Helmer Scientific i.Series
®
and Horizon Series
™
Freezer - Undercounter
Service and Maintenance Manual
360417/A
34
6 Troubleshooting
NOTICE
Review all safety instructions prior to troubleshooting.
6.1
Access System Problems
Problem
Possible Cause
Action
Door does not lock
Lock mechanism is
damaged.
Inspect lock/latch, Replace if necessary.
Door does not lock
(Magnetic Access Control
Option)
Magnetic door lock is not
aligned with the strike plate.
Align lock/door to the match strike plate.
Magnetic lock is not
receiving power.
Trace voltage to the lock using the schematic, replace lock if needed.
6.2
Alarm Activation Problems
Problem
Possible Cause
Action
Battery alarms
The battery switch is in the off “o”
position.
Turn the key to the on “-” position.
The battery is low due to a power
failure.
Allow the battery to recharge.
Faulty battery or wiring
connection.
Check wiring and replace battery if needed.
Probe failure alarms
Faulty probe or wiring
connection.
Check corresponding probe connection. Test resistance of probe
(86 Ω to 110 Ω) Replace probe if needed.
Power failure alarm
Power was interrupted to freezer.
Restore facility power.
Power switch is in the off “o”
position.
Turn power switch to the on “-” position.
Power cord is loose.
Check both ends of the power cord at the wall outlet and the freezer.
GFI/GFCI Outlet has tripped.
Move to standard outlet. Helmer does not recommend operating this unit on a
GFI outlet.
Door alarm
Door is open.
Close door.
Door alarm delay is set to 0 min.
Check door alarm delay (3 min default setting).
Faulty door switch or wiring
connections.
Check wiring and continuity of switch contacts. Replace switch if needed.
Compressor alarm
Condenser coil is dirty.
Clean condenser coil.
Condenser probe is out of
calibration.
Calibrate probe.
Condenser probe is faulty.
Check corresponding probe connection. Test resistance of probe
(86 Ω to 110 Ω) Replace probe if needed.
Ambient conditions are outside
of specifications.
Ensure ambient conditions are within specifications.
Communication alarms
Communication between circuit
boards is lost.
Reboot/power cycle the freezer. Turn off both main power and battery power,
then turn power back on.
i.Series
